This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 26 |
| 6 | 52 |
| 7 | 107 |
| 8 | 218 |
| 9 | 442 |
| 10 | 899 |
| 11 | 1829 |
| 12 | 3720 |
| 13 | 7565 |
| 14 | 15384 |
| 15 | 31288 |
| 16 | 63632 |
| 17 | 129408 |
| 18 | 263180 |
| 19 | 535236 |
| 20 | 1088521 |
| 21 | 2213749 |
| 22 | 4502149 |
| 23 | 9156120 |
| 24 | 18621004 |
| 25 | 37869943 |
| 26 | 77016935 |
| 27 | 156631035 |
| 28 | 318543977 |
| 29 | 647829886 |
| 30 | 1317505875 |
| 31 | 2679440650 |
| 32 | 5449237333 |